2 Answers
2

You link the word97 specification for your 2000 document. I'm not sure if the file format changed, but luckily the encryption is the same.

I don't think you need the md5 hash (if there is one), you just want to break the encryption. It looks like there are word 97/2000 decryptors on the web (paid or freeware). My basic google search indicated that it's easier to break the proprietary hash + encryption (partially rc4) than to brute-force the password.